Coloplast (fka Mentor) Self-Cath - 16" Straight Tip Intermittent Catheter is sterile with a funnel end. This intermittent catheter has fire-polished eyelets with a siliconized surface for smooth insertion. These single use catheters come packaged straight and are made from medical grade PVC. Rely on Coloplast (fka Mentor), formerly Mentor for your catheter and urological accessory needs. Latex free.